There are several very important reasons why synthetic base stock oil is better than regular base stock.

It’s no coincidence that synthetic base stock oil is better than regular base stock under harsh operating conditions. Regular base stock oils are refined from crude oil, which contains many impurities.

Lack of impurities means synthetic base stock oil is better than regular base stock.

Impurities such sulphur in mineral base stock oil can create corrosion under certain conditions which can be hard to control. Synthetic base stocks on the other hand are engineered from chemicals to a precise formula and thereby have no harmful trace elements.